[CPUFREQ] fix BUG on cpufreq policy init failure
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / pcmcia / soc_common.h
blob9daa73615c8bba3914f1a2fbf44fbfaa09e33b47
1 /*
2 * linux/drivers/pcmcia/soc_common.h
4 * Copyright (C) 2000 John G Dorsey <john+@cs.cmu.edu>
6 * This file contains definitions for the PCMCIA support code common to
7 * integrated SOCs like the SA-11x0 and PXA2xx microprocessors.
8 */
9 #ifndef _ASM_ARCH_PCMCIA
10 #define _ASM_ARCH_PCMCIA
12 /* include the world */
13 #include <linux/clk.h>
14 #include <linux/cpufreq.h>
15 #include <pcmcia/ss.h>
16 #include <pcmcia/cistpl.h>
19 struct device;
20 struct pcmcia_low_level;
23 * This structure encapsulates per-socket state which we might need to
24 * use when responding to a Card Services query of some kind.
26 struct soc_pcmcia_socket {
27 struct pcmcia_socket socket;
30 * Info from low level handler
32 unsigned int nr;
33 struct clk *clk;
36 * Core PCMCIA state
38 const struct pcmcia_low_level *ops;
40 unsigned int status;
41 socket_state_t cs_state;
43 unsigned short spd_io[MAX_IO_WIN];
44 unsigned short spd_mem[MAX_WIN];
45 unsigned short spd_attr[MAX_WIN];
47 struct resource res_skt;
48 struct resource res_io;
49 struct resource res_mem;
50 struct resource res_attr;
51 void __iomem *virt_io;
53 unsigned int irq_state;
55 struct timer_list poll_timer;
56 struct list_head node;
59 struct skt_dev_info {
60 int nskt;
61 struct clk *clk;
62 struct soc_pcmcia_socket skt[0];
65 struct pcmcia_state {
66 unsigned detect: 1,
67 ready: 1,
68 bvd1: 1,
69 bvd2: 1,
70 wrprot: 1,
71 vs_3v: 1,
72 vs_Xv: 1;
75 struct pcmcia_low_level {
76 struct module *owner;
78 /* first socket in system */
79 int first;
80 /* nr of sockets */
81 int nr;
83 int (*hw_init)(struct soc_pcmcia_socket *);
84 void (*hw_shutdown)(struct soc_pcmcia_socket *);
86 void (*socket_state)(struct soc_pcmcia_socket *, struct pcmcia_state *);
87 int (*configure_socket)(struct soc_pcmcia_socket *, const socket_state_t *);
90 * Enable card status IRQs on (re-)initialisation. This can
91 * be called at initialisation, power management event, or
92 * pcmcia event.
94 void (*socket_init)(struct soc_pcmcia_socket *);
97 * Disable card status IRQs and PCMCIA bus on suspend.
99 void (*socket_suspend)(struct soc_pcmcia_socket *);
102 * Hardware specific timing routines.
103 * If provided, the get_timing routine overrides the SOC default.
105 unsigned int (*get_timing)(struct soc_pcmcia_socket *, unsigned int, unsigned int);
106 int (*set_timing)(struct soc_pcmcia_socket *);
107 int (*show_timing)(struct soc_pcmcia_socket *, char *);
109 #ifdef CONFIG_CPU_FREQ
111 * CPUFREQ support.
113 int (*frequency_change)(struct soc_pcmcia_socket *, unsigned long, struct cpufreq_freqs *);
114 #endif
118 struct pcmcia_irqs {
119 int sock;
120 int irq;
121 const char *str;
124 struct soc_pcmcia_timing {
125 unsigned short io;
126 unsigned short mem;
127 unsigned short attr;
130 extern int soc_pcmcia_request_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
131 extern void soc_pcmcia_free_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
132 extern void soc_pcmcia_disable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
133 extern void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt, struct pcmcia_irqs *irqs, int nr);
134 extern void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *, struct soc_pcmcia_timing *);
137 void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt);
138 int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt);
141 #ifdef CONFIG_PCMCIA_DEBUG
143 extern void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
144 int lvl, const char *fmt, ...);
146 #define debug(skt, lvl, fmt, arg...) \
147 soc_pcmcia_debug(skt, __func__, lvl, fmt , ## arg)
149 #else
150 #define debug(skt, lvl, fmt, arg...) do { } while (0)
151 #endif
155 * The PC Card Standard, Release 7, section 4.13.4, says that twIORD
156 * has a minimum value of 165ns. Section 4.13.5 says that twIOWR has
157 * a minimum value of 165ns, as well. Section 4.7.2 (describing
158 * common and attribute memory write timing) says that twWE has a
159 * minimum value of 150ns for a 250ns cycle time (for 5V operation;
160 * see section 4.7.4), or 300ns for a 600ns cycle time (for 3.3V
161 * operation, also section 4.7.4). Section 4.7.3 says that taOE
162 * has a maximum value of 150ns for a 300ns cycle time (for 5V
163 * operation), or 300ns for a 600ns cycle time (for 3.3V operation).
165 * When configuring memory maps, Card Services appears to adopt the policy
166 * that a memory access time of "0" means "use the default." The default
167 * PCMCIA I/O command width time is 165ns. The default PCMCIA 5V attribute
168 * and memory command width time is 150ns; the PCMCIA 3.3V attribute and
169 * memory command width time is 300ns.
171 #define SOC_PCMCIA_IO_ACCESS (165)
172 #define SOC_PCMCIA_5V_MEM_ACCESS (150)
173 #define SOC_PCMCIA_3V_MEM_ACCESS (300)
174 #define SOC_PCMCIA_ATTR_MEM_ACCESS (300)
177 * The socket driver actually works nicely in interrupt-driven form,
178 * so the (relatively infrequent) polling is "just to be sure."
180 #define SOC_PCMCIA_POLL_PERIOD (2*HZ)
183 /* I/O pins replacing memory pins
184 * (PCMCIA System Architecture, 2nd ed., by Don Anderson, p.75)
186 * These signals change meaning when going from memory-only to
187 * memory-or-I/O interface:
189 #define iostschg bvd1
190 #define iospkr bvd2
192 #endif